Solid oxide electrolysis presents the unique feature to allow simultaneous reduction of steam and CO2 into a highly valuable CO+H2 syngas mixture. Both mainstream solid oxide cell architectures, namely anode supported cells (ASCs) and electrolyte supported cells were investigated in co-electrolysis operation. It is found that, ASCs suffer from microstructural instability of the fuel electrode characterized by a migration of nickel away from the interface with the electrolyte as in steam electrolysis. This holds especially true when operated at high temperature, large steam content and large overpotential. Microstructural optimization may be required to enhance durability. Moreover, the thermodynamic of CO2 reduction that differs from the one of steam, is found to induce stronger thermal effects, when operated in dynamic operation. This requires the development of an operational strategy to minimize potential temperature gradient within the stack when dynamic operation is considered.
%0 Journal Article
%1 Costa_2019
%A Costa, Rémi
%A Dueñas, Diana María Amaya
%A Futter, Georg
%A Jahnke, Thomas
%A Riegraf, Matthias
%A Schiller, Guenter
%A Surrey, Alexander
%D 2019
%I The Electrochemical Society
%J ECS Transactions
%K dumuxarticle
%N 1
%P 2527-2536
%R 10.1149/09101.2527ecst
%T Solid Oxide Cells for Power-to-X: Application & Challenges
%U https://doi.org/10.1149%2F09101.2527ecst
%V 91
%X Solid oxide electrolysis presents the unique feature to allow simultaneous reduction of steam and CO2 into a highly valuable CO+H2 syngas mixture. Both mainstream solid oxide cell architectures, namely anode supported cells (ASCs) and electrolyte supported cells were investigated in co-electrolysis operation. It is found that, ASCs suffer from microstructural instability of the fuel electrode characterized by a migration of nickel away from the interface with the electrolyte as in steam electrolysis. This holds especially true when operated at high temperature, large steam content and large overpotential. Microstructural optimization may be required to enhance durability. Moreover, the thermodynamic of CO2 reduction that differs from the one of steam, is found to induce stronger thermal effects, when operated in dynamic operation. This requires the development of an operational strategy to minimize potential temperature gradient within the stack when dynamic operation is considered.
@article{Costa_2019,
abstract = {Solid oxide electrolysis presents the unique feature to allow simultaneous reduction of steam and CO2 into a highly valuable CO+H2 syngas mixture. Both mainstream solid oxide cell architectures, namely anode supported cells (ASCs) and electrolyte supported cells were investigated in co-electrolysis operation. It is found that, ASCs suffer from microstructural instability of the fuel electrode characterized by a migration of nickel away from the interface with the electrolyte as in steam electrolysis. This holds especially true when operated at high temperature, large steam content and large overpotential. Microstructural optimization may be required to enhance durability. Moreover, the thermodynamic of CO2 reduction that differs from the one of steam, is found to induce stronger thermal effects, when operated in dynamic operation. This requires the development of an operational strategy to minimize potential temperature gradient within the stack when dynamic operation is considered.},
added-at = {2020-07-15T09:24:01.000+0200},
author = {Costa, Rémi and Dueñas, Diana María Amaya and Futter, Georg and Jahnke, Thomas and Riegraf, Matthias and Schiller, Guenter and Surrey, Alexander},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2481d5149fb07b4fa680431d315510e71/berndflemisch},
doi = {10.1149/09101.2527ecst},
interhash = {585d77014c0ff45adea97de5c7b764f8},
intrahash = {481d5149fb07b4fa680431d315510e71},
journal = {{ECS} Transactions},
keywords = {dumuxarticle},
number = 1,
pages = {2527-2536},
publisher = {The Electrochemical Society},
timestamp = {2020-07-15T07:24:01.000+0200},
title = {Solid Oxide Cells for Power-to-X: Application {\&} Challenges},
url = {https://doi.org/10.1149%2F09101.2527ecst},
volume = 91,
year = 2019
}
